无法连接到psql控制台：psql：严重：用户“ postgres”的对等身份验证失败

Question

我正在尝试使用psql -U postgres连接到psql控制台，但是不断出现以下错误：

psql: FATAL:  Peer authentication failed for user "postgres"

如果pg_hba.conf上的内容

local   all             postgres                                peer

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     peer
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
local   replication     all                                     peer
host    replication     all             127.0.0.1/32            md5
host    replication     all             ::1/128                 md5